Microfilaria Blood Film
The Microfilaria Blood Film test detects microscopic filarial parasites in the bloodstream. It is used to diagnose filarial infections acquired in endemic regions.
Turnaround time
Results available STAT after arrival in lab. Doctor's report sent the day after results available (if required)
Biomarkers count
1
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Home visits require at least 24 hours notice.
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Details about Microfilaria Blood Film
What is the Microfilaria Blood Film test?
The Microfilaria Blood Film test is a microscopic examination of a blood sample to identify microfilariae, which are the larval forms of filarial worms. These parasites circulate in the blood in certain filarial infections.
The test involves preparing a stained blood film that is examined under a microscope by a trained specialist. It allows direct visual confirmation of parasitic infection and, in some cases, identification of the filarial species based on morphology.
This test is commonly used in the diagnosis of lymphatic filariasis and other filarial diseases, particularly in individuals with travel or residence history in endemic areas.
Why do I need a Microfilaria Blood Film test?
Filarial infections can cause chronic symptoms and may remain undiagnosed without specific testing. Blood film examination is a key diagnostic step.
You may need this test if you:
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Have lived in or travelled to tropical or subtropical regions
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Experience unexplained swelling of limbs or lymph nodes
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Have recurrent fever episodes
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Experience night sweats or fatigue
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Have eosinophilia on blood tests
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Have unexplained skin or eye symptoms
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Are being investigated for parasitic infection
The test helps confirm whether symptoms are related to a filarial parasite.
Benefits of the test
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Direct detection of parasites
Confirms infection by visual identification. -
Supports diagnosis of filarial disease
Essential in lymphatic filariasis investigation. -
Useful in symptomatic and asymptomatic cases
Can detect infection even without severe symptoms. -
Widely used in tropical medicine
Standard diagnostic method. -
Simple blood-based testing
Requires only one blood sample. -
Helps guide further investigation
Positive results support targeted follow-up. -
Complements antibody testing
Provides direct evidence of infection. -
Reduces diagnostic uncertainty
Confirms parasitic cause of symptoms.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
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Choose your nearest UK clinic
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Attend your appointment
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Blood sample taken by a clinician
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Blood film prepared and examined
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Results are issued once analysis is complete
Home or hotel visit (+£60, UK-wide)
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Mobile phlebotomist attends your location
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Blood sample taken at home or hotel
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Sample transported to the laboratory for analysis
Timing of blood collection may be important, as some microfilariae circulate at specific times.
Your results explained
Negative result
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No microfilariae seen
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UK standard: Negative
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No evidence of filarial parasites in the blood
Positive result
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Microfilariae detected on blood film
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UK standard: Positive
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Confirms filarial infection
Further testing may be required to identify species and assess disease extent.
How It Works
Simple steps to get your results
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Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.